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I.Overview
Transformer DC resistance is a must-test item in transformer manufacturing for
semi-finished products, finished products, factory test, installation, overhaul, after tap
changer change, handover test, and preventive test in the power sector. You can check
the welding quality of the winding joints and whether the windings have inter-turn short
circuits. You can check whether the contact of each position of the voltage tap changer is
good, whether the actual position of the tap changer matches the indicated position,
whether the lead wire is broken, and multiple strands of wire are wound Whether there is
any stock breakage, etc. In order to meet the needs of rapid measurement of transformer
DC resistance, the HZ-3100A DC resistance tester developed by our company. The
instrument adopts a brand-new power supply technology, which has the characteristics of
small size, light weight, large output current, good repeatability, strong anti-interference
ability, and complete protection functions. The whole machine is controlled by a
high-speed single-chip microcomputer, with a high degree of automation, with automatic
discharge and discharge alarm functions. The instrument has high test accuracy and
simple operation, which can realize the rapid measurement of transformer direct
resistance.
